Oil pump



Jan. l2, 1932. H E MEYER 1,840,676

OIL PUMP Filed July 3, 1929 A El i-gj;

H21@ I 1 j L Imfetr HARVEY MEYER Y /v Qmvm" Patented Jan. 12, 1932 rarest essere HARVEY E. MEYER, OF KANSAS CITY, `MISSOURI, ASSIGNOR TO VOLCAN MANUFAC- ,T

TUBING COMPANY, OF

KANSAS CITY, MISSOURI, A OOBPOEATION OFVIVIISSOURI OIL PUMP Application filed July 3, 1929, Serial No. 375,815. o

This invention relates to a mechanism for preventing the leakage of lubricants fromV any sealel container through which a movable shaft is operated, by returning to the inside of said sealed container the lubricant that finds its way out through the journal bearing. rIhe primary object of the invention is to provide a simple mechanism which operates automatically to prevent leakage of forcing such oil as tends to leak out, to returnv to its proper reservoir. More particularly I refer to a certain type of washing machine having its gears and connecting rod enclosed in a sealed gear case which is filled with lubricant and whichV is operated by a worm drive also enclosed in said gear case, said worm gear being part of a shaft extending through said gear case to the power supply. Heretofore great dificulty has existed in preventing the oil from said gear case from leaking through the bearing where said shaft extends through the gear case. My invention obviates this diiiculty in a simple and automatic manner by providing a rotary pump, driven by the shaft, for returning the lubricant to the reservoir.

Numerous other objects and advantages of this invention will be apparent from the following detailed description of oneapproved form of apparatus embodying the principles of this invention.

In the accompanying drawings:

Fig. 1 is a sectional plan view.

Fig. 2 is a vertical section taken substantially on the line 2-2 of Fig. 1.

Fig. 3 is a detail perspective view of the cylindrical bushing described further below.

Fig. 1 is a vertical A cross section taken substantially along the line 4.--4 of Fig. 2.

Referring now more particularly to the drawings wherein like and corresponding parts are designated by similar reference characters throughout, 1 indicates the wall i of the casing, in which is enclosed aworm 2 mounted on a shaft 3, which extends through said casing, land 2, and on which is'mounted on the outside of said casing a pulley 4. A Aworm gear 5 is shown meshed with the worm 2 and oil or the like through a journal bearing byV Vby means cfa cotter pin as clearly shown in Figs.

is caused to rotate thereby in the direction shownby the arrows whenever power is applied to the pulley l1 and which worm gear 5 in' turn.V operates the connecting 4rod (not shownlone end of which is attached to the trunnion 6. One end of the shaft 3 is journaled in the socket bearing 7 in the casing 1 and vhas a shoulder 8 which prevents lateral movement in one direction. The other. end of shaft 3 extends through said casing 1, as above described. It is on this end of the shaft that the invention'described herein is located. A shoulder 9 isf permanently attached to the sha-ft3. 110'and 11 are washers formed with 'roller'bearingjraceways and fitted loosely over the shaft 3, washers is locatedtlie ball thrust bearing cage 12; The shaft 3'beyond the thrust bearingis journaled in a cylindrical shaped bushing 13 having a key 14 'in which engages a screw plug or other key 15 mounted in the" casing 1 by which the bushing is securelyV fastened tothe casing 1, as shown in Figs; 1 and 2. The bushing 13 isiformied with a slot or lubricant passage 16 extending diagonally inward and downward through one side of the bushing from 'the outer end 17 tothe linner end 18 thereof. The outer end portion 17' of the slot'is off greater depth than the inner end portion 18. The outer corner 19 is cut away or beveled as indicated at 20. Next between which Y best shown in Fig. 4, having a pluralcurved blades 22 forming pockets 23 securely to the shaft 3 24, as' clearly shown 21, as ity of and which is fastened in Fig. 2. y Y

v In operation, the casing 1 is filled with lu- .bricantr'and then sealed so as t0 prevent escape or leakage of anyof said lubricant. However, the bearing formed by the passage of the shaft 3 through the bushing 13 is not lubricant-'tight `inasmuch as the shaft must rotate through said'bushing. Hence the lubricant tends to leak through this joint. As o it does so, it comes into Contact with the rotor 21which is rotating with `the shaft 3 in a direction indicated bythe arrows. ing lubricant-iis thereupon forced into the The leaklubricant to rise toward the outer ends of the blades 22. As each of the blades 22 passes by the open outer end of slot 16 of the bushing 13, the edge 25 of the slot 16 wipes the eX- cessive oil from the blade and directs it into the slot 16. Inasmuch as the outer end 17 of the slot 16 is higher than the inner end 18 due to the diagonal position of the slot in the cylindrical bushing 13, the lubricant wiped od by the edge 25 is caused to flow in the slot 16 toward the end 18 and thence back into the inside of the casing 1. Because the end 18 is of less depth than the end 17, the returning lubricant is discharged over the washer 11 and back inside the casing 1 instead of being forced between the washer 11 and the bushing 13 as would be the case were the end 18 of the slot 16 of equal depth with the outer end 17. Also the movement of the gearinside said casing causes the lubricant lilling said casing to surge about and in passing the inner end 17 of the slot 14, creates a partial vacuum in said slot and tends to draw any lubricant that is in the slot into the casing.

I claim:

1. In combination with a casing containing lubricant, a rotary shaft extending through one wall of said casing and a fixed bushing mountedin the wall in which said shaft is journaled, said bushing having' a slot formed in its outer cylindrical surface and inclined downwardly from its outer to its inner end and means ymounted'on the outer portion of the shaft and rota able therewith for collecting lubricant that has leaked through the bearing surface and for forcing the lubricant through said passage into the casing.

2. In combination with a casing containing lubricant, a rotary shaft extending through one wall of said casing and a fixed bushing mounted in the-wall in which said shaft is journaled said bushing having a diagonal slot in its outer cylindrical surfacey inclined downwardly from its outer to itsinner end, said outer end being' of greater depth than the inner end and means mounted on the outer portion of the shaft and rotatable therewith for collecting and forcing the lubricant through said passage.

3. In combination with a casing containing lubricant, a rotary shaft extending through one wall of said casing and a stationary bushing mounted in the wall in which said shaft is journaled, said bushing having a diagonal slot in its outer cylindrical surface inclined downwardly from its outer to its inner end, said outer end being of greater depth than the inner end and rotary pump mounted on the outer portion of the shaft and rotatable therewith for collecting lubricant that has leaked through the bearing surface and for forcing the lubricant into said passage which leads to the interior'of the casing.

di. In combination with a casing containing lubricant, a rotary shaft extending through one wall of said casing, and a bushing iXedly mounted in the. wall in which said shaft is journaled, said bushing having a lubricant return passage extending downwardly to the inner end of said bushing and spaced apart from the bearing surface, a wiping edge located on the outer end of said passage, and a rotary pump mounted on the outer portion of the shaft and operated thereby adjacent the outer end of said bushing adapted to direct lubricants escaping' through the bearing surface to said wiping enge and into said return passage.

In combination with aV casing containing lubricant, a rotary shaft extending` through one wall of said casing, a bushing iiizedly mounted in the wall in which said shaft is journaled, said bushing having a lubricant return extending downwardly to the inner end of said bushing, and spaced apart from the bearing surface, and a rotary pump mounted on the outer portion of the shaft and operated thereby, adjacent the outer end of said bushing adapted to direct lubricant escaping through the bearing surface into said return passage.

HARVEY E. MEYER. 

